☁ Three-Tier Web Application Deployment using Terraform, Kubernetes, and GitHub Actions

This project demonstrates the end-to-end deployment of a scalable three-tier web application using Infrastructure as Code (Terraform), containerization (Docker), orchestration (Kubernetes on AWS EKS), and CI/CD automation (GitHub Actions).

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Tech Stack Used

•	Frontend: React
•	Backend: Node.js + Express
•	Containerization: Docker
•	CI/CD: GitHub Actions
•	Orchestration: Kubernetes (EKS)
•	Infra as Code: Terraform
•	Cloud Provider: AWS

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Repository Structure

three-tier-app/
│
├── terraform/              # Infrastructure provisioning using Terraform
├── k8s/                    # Kubernetes manifests for frontend, backend
├── frontend/               # React-based frontend (Dockerized)
├── backend/                # Node.js backend with MongoDB connection (Dockerized)
└── .github/workflows/      # CI/CD pipelines (build & deploy)

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Features Implemented

•	 CI/CD pipeline for both frontend & backend using GitHub Actions
•	 Dockerized both services with separate Dockerfiles
•	 Pushed Docker images to DockerHub
•	 Created EKS cluster using Terraform
•	 Deployed both services to EKS with LoadBalancer service
•	 Externally accessible React UI which interacts with the backend

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Setup Steps

1️⃣ Clone this Repository

2️⃣ Setup AWS Credentials

aws configure

3️⃣ Terraform Infra Setup

cd terraform
terraform init
terraform apply

4️⃣ Deploy to EKS

cd ../k8s
kubectl apply -f .

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GitHub Actions CI/CD

•	Automatic build & push of Docker images to DockerHub
•	Auto-deploy to Kubernetes after every push to main branch

See .github/workflows for pipeline config